AHI Calculator
Apnea-Hypopnea Index Calculator for Sleep Apnea Assessment
Calculate your Apnea-Hypopnea Index (AHI) to determine sleep apnea severity and get personalized recommendations.
Sleep Study Data
Complete cessation of airflow for ≥10 seconds
Partial reduction in airflow (≥30%) with oxygen desaturation
Actual sleep time during the study period
For calculating RDI (Respiratory Disturbance Index)
AHI Formula
AHI = (Apnea Events + Hypopnea Events) / Sleep Hours
AHI measures the average number of apnea and hypopnea episodes per hour of sleep
AHI Classification
Medical Disclaimer
This calculator is for educational purposes only. Always consult with a qualified sleep specialist or physician for proper diagnosis and treatment of sleep apnea.
Understanding AHI
The Apnea-Hypopnea Index (AHI) is the number of apnea and hypopnea events per hour of sleep. It's the primary metric used to diagnose and classify the severity of obstructive sleep apnea (OSA).
Key Definitions:
- Apnea: Complete cessation of airflow for ≥10 seconds
- Hypopnea: ≥30% reduction in airflow with ≥3% oxygen desaturation or arousal
- RDI: Includes respiratory effort-related arousals (RERAs)
- Sleep Time: Actual sleep duration, not time in bed
Health Implications
Untreated sleep apnea can lead to serious health complications:
- Increased risk of cardiovascular disease
- High blood pressure and stroke
- Type 2 diabetes
- Daytime fatigue and drowsiness
- Cognitive impairment and memory problems
- Depression and mood disorders
- Increased accident risk
Treatment Options
Lifestyle Changes:
- Weight loss
- Avoid alcohol before bed
- Sleep on your side
- Regular exercise
- Quit smoking
Medical Devices:
- CPAP (Continuous Positive Airway Pressure)
- BiPAP (Bilevel Positive Airway Pressure)
- Oral appliances
- Positional therapy devices
Surgical Options:
- Uvulopalatopharyngoplasty (UPPP)
- Maxillomandibular advancement
- Hypoglossal nerve stimulation
- Nasal surgery
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